Siphon water-closet.



Patented July 8 A. GOCHRAN. SIPHON WATER CLOSET.

APPLICATION FILED mumz, 1911 COLUMBIA rumoouAPn 111.. WASHINGTON. 0 c4 UNITED strA'r 'g s PATENT OFFICE.

ANDREW COCHRAN, OF TRENTON, NE! JERSEY, ASSIGNOR TO COCHRAN, DRUGAN & 00., OF TRENTON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SIPHON WATER-CLOSET.

Application filed March 22, 1911.

To all whom. if may COIUWIH.

Be it known that l, Arnmcw tocnnivx, a citizen of the l nited States, and a resident of Trenton, Mercer county, New Jersey, have invented certain Improvements in Siphon Water-t losets, of which the following is a specification.

My invention relates to water closets of the siphon type, and my present improvements have been applied to water closet bowls of the type familiarly known as reversed trap bowls.

The principal object of my invention is to provide for the delivery of a strong stream of water for the initial flow or dis charge through the down leg of the siphon passage and for this purpose I have equipped a siphon closet of this type with a simple form of jet which may be disposed in the rear wall of the bowl, above the level of water therein forming the seal, for the delivery of a portion of the flushing water to the chamber where the upper portions of the ascending and descending legs of the siphon passage meet. Such jet is arranged to be sealed by water flowing from the tank after the completion of the flushing operation and commonly known as the after till.

A further object of my invention is to provide a closet of this type having such concealed jet, with an enlarged chamber at the upper part of the ascending and descending legs of the siphon passage; the rear wall of the bowl having bulging projections forming an enlarged internal chamber partly divided and reduced in area by an inwardly projecting and centrally disposed rib.

These and other features of my invention will be more fully referred to hereinafter, reference being had to the accompanying drawings, in which:

Figure l, is a sectional elevation of a water closet bowl made in accordance with my invention; Fig. 2, is a plan view partly in section on the line M di, Fig. l. and Figs. 3 and 4, are sectional views of modified forms of closet bowls embodying my inven tion.

The inducing of siphonic :ction by providing the descending leg of the siphon passage of a water closet bowl with projections Specification of Letters Patent.

Patent ed J uly S, 1913.

Serial No. 816,113.

is well known, and the closet bowl of the Frame and Netf patent and other closets embodying the same idea have been in use for many years. These closets while satis factory in the main, have never proved as etlicient in action when flushed with water from low down tanks as they have done with the high tanks, and the important feature of my invention is the provision of means in a siphon closet of the reversed trap type that will enable it to operate successt'ully with the water supply from a low down tank.

In Fig. 1 of the zu-companying drawings, showing the preferred embodiment of my invention, 1 represents the main bowl of the closet, having a rim 2 with apertures leading from said rim for discharging water into the bowl over the surface of the same. The ascending leg of the siphon passage is indicated at 4-. while the descending leg of the siphon passage is indicated at 5.

The essential feature of my invention consists of a concealed passage at the rear of the bowl for delivering a jet of water into the upper part of the siphon passage under considerable force before the water from the bowl enters the same. Flushing water from a suitable tank enters the bowl structure through an inlet opening 6 leading to a chamber 7 at the rear of the bowl; part of such water going to the hollow rim 2, while the balance goes to a jet passage 8 leading from the forward end of the inlet chamber 7; such passage being curved so as to discharge into the upper part of the siphon passage; striking the curved wall and being deflected to the descending leg 5; and creating such a flow of water and under such pressure that siphonic action will be induced by the time the contents of the bowl flow over the weir 9 between the ascending and descending legs of the siphon passage and insuring a rapid and complete emptying of the bowl. The passage 8 is preferably contracted in the manner imlicated by dotted lines in Fig. 2. The discharge outlet. of the jet passage 8 is also provided with a weir it), and this weir is so disposed that when the flow of water through the same ceases, sutlicient water of the after till will trickle in from the chamber 7 to insure the desired seal; the. height of which is governed by such weir.

tn Figs. 3 and 4. l have shown other forms of chx et bowls having concealed jet passages. such bowls. in addition presenting ether features of invention forming the subject of a separate application for patent.

in Fig. t. 1 represents the bowl of the closet. having a rim 2 with apertures 23 leading from said rim "or discharging water into the bowl and over the surface of the inner wall of the same. The ascending leg of the siphon passage is indicated at 4- while the descending leg of the siphon passage is indicated gener; lly by the reference numeral 5, and it may have a series ef zones or spaces between the w ir t) and a discharge outlet 11. which will be more fully described hereinafter. The width of the as cending leg in one plane for instance the plane of the section shown in Fig. :3. may be approximately three inches. while in a plane substantially at right angles to this. the width may be approximately live inches, and this width continues to the junction with the descending leg so that an enlarged chamber 12 may be provided at the top of said descending leg or at the junction of the same with the ascending leg of said siphon passage. Th s chamber may have a pair of enlargements '13 formed in the rat wall of the bowl. with a depressed central portion or rib 1,4; the inner surface of said enlargements being continuations of the curved wall at the top of the chamber laiding from the upper wall of the ascending leg of the siphon passage. Within the descending leg of the siphon passage 5 a zigzag channel may be provided. To this end the rear wall of the structure may have a ledge or shelf 15, which may define the bottom of the enlarged chamber 12 and disposed substantially op msi e a bend it in the bore of said descending leg, and from said shelf the pa sage, in this part substantially circular in cross section with )1 'alleling walls 17 and 18. descends at a slight angle pointed rearwardly to a bottom shelf 19; which latter shelf is disposed rearwardly of the dis charge, outlet 11, while the forward wall of the said outlet is in line with a curved wall 20 of said passage extending t and joining the inclined wall 18 at the point 21. t will be seen, therefo'e, that the initial flow of water over the weir 9 will strike the shelf a partial vacuum and inducing siphenic ;u'- i tion. The presence of the enlarged space at the top of the asceinling leg gives spa e for a large volume of air. and con equently when the dischari'l'e from the bowl nears its i water within the bowl as an after fill to make the desired seal; the height of which is governed by the weir 9.

In Fig. at, 1* represents the bowl of the closet, having a rim 2'" with apertures 13" leading from said rim for discharging water into the bowl and over the surface of the inner wall of the same. The ascending leg of the siphon passage is indiiated at l", while the descending leg of the siphon passage is indicated generally by the reference mnneral 5 and it may have a series of zones or spaces between the weir 9 and the discharge outlet l1 which will be more fully described lwreinafter. is in the structure shown in Fig. 3. the width of the ascending leg in one plane, fer instance the plane of the section shown. may be 211)1)1"()Xil1l;tt0l three inches. while in a plane substantially at right angles to this. the width may be approximately live inches. and this width continues to the junctitn with the descending leg so that an enlarged chamber 12 may be provided at the top of said descending leg. This chamber may have a pair of enlargements 13 formed in the r ar wall of the bowl. with a depressed central portion ll-* the inner surface of said enlargements being continuatiens of the curved wall atchamber leading from the the top of the the ascending leg of. the

upper wall of siphon pa sage.

in Fig. 4. l have shown a modified constrnctien of the de cending leg 5 of the siphon passage in which. I form an enlarged chamber 22 in the lower part of the same from which the discharge outlet 11" leads. The wall opposite the ledge or shelf is curved as indicated at 2 and a projection Qt is provided substantially midway between the weir 9 and the bottom of the chamber which may have a shelf at the rear ofthe discharge outlet. Toward the front of said chamber the wall is curved as indicated at 23, while the rear wall of said chamber below the ledge or shelf 15 i also curved indicated at 26. Water from the bowl flowing over the weir fl strikes the shelf or ledge 15 and is deflected by the curved wall where. stril ing the projection 2t. it. will be shot in the reverse direction and strike the bottom shelf 19 In this zig-zag course air vill be cut off, creating a partial yacuum and inducing the desired siphonic action.

in each of the structures shown in Figs. 3) and 't. a concealed passage for the delivery of a jet of water to the chambers 12 and i2 is present, such passag s (littering slightly from that shown in Fig 1. however. in that they are formed in the rear i all of the bowl and are return passagei, the outlets therefrom being at the top of the enlarged chamend, the force of the flow will slow down. hers 12 and 12. These passages. indicated breaking the siphon and insuring sot licient l at S and S respectively l ad from the chambers 7" and 7*, having the water inlet openings 6 and (3 and are of such a length and provided with weirs 10 and it) that a proper seal may be afforded by the after till.

I claim:

1. A water closet bowl of the siphon type having a hollow flushing rim, a siphon eonduit leading from said bowl and comprising intake and discharge legs, a hollow chamber at the rear of the bowl above the siphon passages wholly within the body of the bowl, and an inlet for flushing water delivering to said hollow chamber, said hollow chamber having an outlet leading to the hollow flushing rim and a trapped outlet leading directly to the upper part of the discharge leg of the siphon conduit whereby water may be delivered thereto to induce siphonic action before the discharge leg ot said siphon conduit fills from the bowl, said trapped outlet having a seal wholly tree: from and with an outlet disposed above the tion of the same discharged directly into the upper part of the descending leg of the siphon passage whereby siphonic action may be induced before said descending leg iills from the bowl, said auxiliary passage having a seal wholly free from and with an outlet disposed above the level of water in the bowl.

3. A water closet bowl of the siphon type having a hollow flushing rim, an outlet pasl l l l l l sage or conduit leading from said bowl amt comprising intake and discharge legs, a hollow chamber in the wall of the structure at the rear of the bowl above the siphon passages and wholly within the body of the bowl, an inlet for flushing water leading to said hollow chamber. a passage for water leading from said hollow chamber to the hollow [lashing rim, a separate passage leading to the discharge leg of the siphon con duit whereby water may be delivered thereto to induce siphonic action before the discharge leg of said siphon conduit tills from the bowl, and a seal tor said latter passage wholly tree from and having an out let disposed above the level of water in the bowl, the water delivered from said passage being under substantially the full head from the inlet.

at. A water closet bowl of the siphon type having a hollow llushing rim, an outlet passage or conduit leading from said bowl and comprising intake and discharge legs, an inlet for flushing water, a chamber at the rear of the bowl receiving the same, said chamber connnunicating with the llushing rim and disposed wholly within the body of the bowl, and an auxiliary passage also connnunicating with said chamber and leading to the upper part of the discharge leg of the siphon conduit or outlet passage, such construction effecting a division of the Hushing water whereby a portion of the same may be discharged under substantially t'ull head directly into the upper part of the descending leg of the siphon passage and induce siphonic action before said descending leg fills from the bowl, said trapped outlet having a seal wholly tree from and disposed above the level of water in the bowl.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ANDREY COCHRAN. 'itnesses:

hhxLconw G. ()mriixx'r, MURRAY C. BUYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

